Example program for distance_pl

 

dev_close_window ()
read_image (Image, 'mreut')
dev_open_window (0, 0, 512, 512, 'white', WindowID)
dev_display (Image)
dev_set_color ('black')

threshold (Image, Region, 180, 255)

dev_clear_window ()
dev_display (Region)

connection (Region, ConnectedRegions)
select_shape (ConnectedRegions, SelectedRegions, 'area', 'and', 10000, 100000000)
* 訪問對象的輪廓(點座標)
get_region_contour (SelectedRegions, Rows, Columns)

RowLine1 := 5
ColLine1 := 300
RowLine2 := 300
ColLine2 := 400
NumberTuple := |Rows|
dev_set_color ('red')
disp_line (WindowID, RowLine1, ColLine1, RowLine2, ColLine2)

dev_set_color ('green')
for i := 1 to NumberTuple by 20
    * 在這個點上畫了一個十字
    disp_line (WindowID, Rows[i], Columns[i] - 2, Rows[i], Columns[i] + 2)
    disp_line (WindowID, Rows[i] - 2, Columns[i], Rows[i] + 2, Columns[i])
    * 計算點線距離
    distance_pl (Rows[i], Columns[i], RowLine1, ColLine1, RowLine2, ColLine2, Distance)
stop()
endfor